Should 2 teaspoons expand this full?

Hi! I have a question I hope some of you can help me answer. I have Harney & Sons Irish Breakfast in a 4oz tin. I've had it for about a year and a half and not used much of it but today made a teapot of it and am not sure if I did something wrong in process or if the tea is too old/crumbly or what..

Here are a few pictures of my teapot, strainer and size of dry leaves.

That looks about right. If you've been drinking a lot of larger, full leafed teas lately the result probably looks weird. This is because broken up teas are a lot more dense in comparison.

Or to put it another way, when you put full leaf teas into a teaspoon, there is still a lot of air still in the teaspoon, but with chopped up teas there is less air.

This is why some people weigh their tea, as the weight will give you a better idea of how much tea you are using than volume. (Professional bakers will do this too, as some flours are more dense than others).